科学论文里经常出现的Means and s.e.

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科学论文里经常出现的Meansands.e.科学论文里经常出现的Meansands.e.科学论文里经常出现的Meansands.e.mean±SD或mean±SEM平均数±标准差或标准误standar

科学论文里经常出现的Means and s.e.
科学论文里经常出现的Means and s.e.

科学论文里经常出现的Means and s.e.
mean±SD或 mean±SEM平均数±标准差或标准误
standard error of measurement
The standard deviation (SD) represents variation in the values of a variable,whereas the standard error of the mean (SEM) represents the spread that the mean of a sample of the values would have if you kept taking samples.So the SEM gives you an idea of the accuracy of the mean,and the SD gives you an idea of the variability of single observations.The two are related:SEM = SD/(square root of sample size).
简单地说就是平均数的抽样误差,反映平均数的抽样准确性,国内用标准偏移值SD的较多,SEM=SD除以(样本数的平方根)……